Loans Portfolio - Schedule of Activity In Allowance For Loan Losses (Details) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
		Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2021
Financing Receivable Allowance For Credit Losses [Line Items]
Total allowance for loan losses, Balance				$ 6,000	$ 6,000
Allowance for credit losses					2,500
Total allowance for loan losses, Balance		$ 59,213			59,213
Allowance, Loan Losses [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total allowance for loan losses, Balance		76,144	$ 84,066	6,000	6,000
Initial CECL allowance, January 1, 2021				78,251	78,251
Allowance for credit losses		(9,306)	(7,922)	(185)
Total allowance for loan losses, Balance		$ 66,838	76,144	84,066	$ 66,838
Percent of Unpaid Principal Balance at September 30, 2021		1.00%			1.00%
Allowance, Loan Losses [Member] | Specific CECL Allowance [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total allowance for loan losses, Balance	[1]	$ 6,500	6,000	6,000	$ 6,000
Allowance for credit losses	[1]	2,000	500
Total allowance for loan losses, Balance	[1]	8,500	6,500	6,000	8,500
Allowance, Loan Losses [Member] | Loans Receivable Held For Investment [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total allowance for loan losses, Balance		61,867	65,821
Initial CECL allowance, January 1, 2021				64,274	64,274
Allowance for credit losses		(11,154)	(3,954)	1,547
Total allowance for loan losses, Balance		50,713	61,867	65,821	50,713
Allowance, Loan Losses [Member] | Interests In Loans Receivable Held For Investment [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total allowance for loan losses, Balance		535	265
Initial CECL allowance, January 1, 2021				406	406
Allowance for credit losses		(306)	270	(141)
Total allowance for loan losses, Balance		229	535	265	229
Allowance, Loan Losses [Member] | Accrued Interest Receivable [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total allowance for loan losses, Balance		310	343
Initial CECL allowance, January 1, 2021				357	357
Allowance for credit losses		(64)	(33)	(14)
Total allowance for loan losses, Balance		246	310	343	246
Allowance, Loan Losses [Member] | Unfunded Loan Commitments [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total allowance for loan losses, Balance	[2]	6,932	11,637
Initial CECL allowance, January 1, 2021	[2]			13,214	13,214
Allowance for credit losses	[2]	218	(4,705)	(1,577)
Total allowance for loan losses, Balance	[2]	$ 7,150	$ 6,932	$ 11,637	$ 7,150

[1] As of December 31, 2020, amounts represent specific loan loss provisions recorded on assets before the adoption of ASU 2016-13. After the adoption of ASU 2016-13 on January 1, 2021, amounts represent Specific CECL allowance.

[2] The CECL allowance for unfunded commitments is included in accounts payable and accrued expenses on the Company’s consolidated balance sheets.